Precision Micropower, OVP, RRIO
Operational Amplifier
ADA4091-2/ADA4091-4
FEATURES
PIN CONFIGURATIONS
Single-supply operation: 2.7 V to 36 V
Wide input voltage range
Rail-to-rail output swing
Low supply current: 200 µA/amplifier
Wide bandwidth: 1.2 MHz
OUTA
–INA
+INA
–V
1
2
3
4
8
7
6
5
+V
OUTB
–INB
+INB
ADA4091-2
TOP VIEW
(Not to Scale)
Figure 1. 8-Lead, Narrow-Body SOIC (R-8)
Slew rate: 0.46 V/µs
OUTA
–INA
+INA
–V
1
2
3
4
8
7
6
5
+V
Low offset voltage: 250 µV maximum
No phase reversal
Overvoltage protection (OVP)
25 V above/below supply rails at 5 V
12 V above/below supply rails at 15 V
OUTB
–INB
+INB
ADA4091-2
TOP VIEW
(Not to Scale)
NOTES
1. IT IS RECOMMENDED TO CONNECT THE
EXPOSED PAD TO V–.
APPLICATIONS
Figure 2. 8-Lead LFCSP (CP-8-9)
Industrial process control
Battery-powered instrumentation
Power supply control and protection
Telecommunications
Remote sensors
Low voltage strain gage amplifiers
DAC output amplifiers
1
2
3
4
5
6
7
14
13
12
11
10
9
OUTA
–INA
+INA
+V
OUTD
–IND
+IND
–V
ADA4091-4
TOP VIEW
(Not to Scale)
+INB
–INB
OUTB
+INC
–INC
OUTC
8
Figure 3. 14-Lead TSSOP (RU-14)
GENERAL DESCRIPTION
The ADA4091-2 dual and ADA4091-4 quad are micropower,
single-supply, 1.2 MHz bandwidth amplifiers featuring rail-to-
rail inputs and outputs. They are guaranteed to operate from a
+2.7 V to +30 V single supply as well as from 1.35 V to 15 V
dual supplies.
–INA
+INA
V+
1
2
3
4
12 –IND
11 +IND
10 V–
ADA4091-4
TOP
VIEW
9
+INC
+INB
The ADA4091 family features a unique input stage that allows
the input voltage to exceed either supply safely without any phase
reversal or latch-up; this is called overvoltage protection, or OVP.
Applications for these amplifiers include portable telecom-
munications equipment, power supply control and protection,
and interface for transducers with wide output ranges. Sensors
requiring a rail-to-rail input amplifier include Hall effect, piezo-
electric, and resistive transducers.
NOTES
1. NC = NO CONNECT.
2. IT IS RECOMMENDED TO CONNECT THE
EXPOSED PAD TO V–.
Figure 4. 16-Lead LFCSP (CP-16-17)
The ADA4091-2 is available in 8-lead, plastic SOIC and 8-lead
LFCSP packages. The ADA4091-4 is available in 14–lead TSSOP
and 16-lead LFCSP surface-mount packages.
The ability to swing rail-to-rail at both the input and output enables
designers, for example, to build multistage filters in single-supply
systems and to maintain high signal-to-noise ratios (SNR).
Table 1. Low Power, 36 V Operational Amplifiers
The ADA4091 family is specified over the extended industrial
temperature range of −40°C to +125°C. The ADA4091 family is
part of the growing selection of 36 V, low power op amps from
Analog Devices, Inc., (see Table 1).
Family
Single
Dual
Rail-to-Rail I/O
PJFET
Low Noise
OP1177
OP2177
OP4177
ADA4091-2
ADA4091-4
AD8682
AD8684
Quad
Rev. E
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